Asking for trouble buying those doors. Get a lot of customers asking us to fit them after they have bought them but we won't fit them now.
Panels look nice but are flimsy and the running gear putting it plainly are rubbish.Cheap components used.
They last 3 years max, ok if your selling up or renovating to sell on but not for keeping.

For the roof, do you want a conventional timber / felt roof or composite insulated one?
for the latter these are good.http://www.icroofing.co.uk/